If you want to unzip a file "test.zip" in the current directory, just send a raw ftp command "SITE UZIP test.zip".If you want to compress files "test001.jpg", "test002.jpg", "test003.jpg" into a zip file "myphoto.zip", just send a raw ftp command "SITE ZIP myphoto.zip test001.jpg||test002.jpg||test003.jpg"